AWWA ACE70648

This powerpoint presentation begins by presenting the unexpected problem statement: bromate concentrations many times higher than the 10 µg/l MCL in three open reservoirs of the Los Angeles Department of Power and Water. The three reservoirs include the Ivanhoe, the Elysian, and the Silver Lake Reservoirs. The bromate triangle working hypothesis is presented, along with the idea that the formation of bromate is a possible photochemical reaction in open, chlorinated reservoirs. The relationship between light intensity and bromate production is explored, and the Remote Electro-optical Sensor (REOS) is presented. The shade-ball light-blocking option is discussed as the solution to the bromate problem. Includes figures.